Window fan housing



FIG. 1 is a front perspective view of a window fan housing showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right side view thereof; and,

FIG. 4 is a left side view thereof.

The rear view forms no part of the claimed design. The broken-line showing of environmental structure in FIGS. 1-4 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design of a window fan housing, as shown and described. 